An Arrhenius acid is best defined as a A) proton acceptor B) Substance that diss

Question

An Arrhenius acid is best defined as a A) proton acceptor B) Substance that dissociates in water to Produce aqueous hydroxide ions C) Substance that dissociates in water to Produce arequeous hydrogen ions. D) hydroxide donor. 2) Which one the follwing species acts as a Bronsted - Lowry acid in water> A) CH3NH2 B) C_6H_6 C) NH_4+ D) NaH 3) Indicate all the Bronsted - Lowry acids in the following chemical reactions HCI(aq) + H_2O(aq) H_3O + (aq) + CI-(aq) A) HCI B) HCI, H_2O C) HCI, CI - D) HCI, H_2O, H_3O+ 4) Identify the conjugate acid/base points presents in an aqueous solution of hydrogen sulfate ion, HSO_4 5) WHich Bronsted-lowry base has the strongest conjugate acid?

Explanation / Answer

Q1 ) Option C -- Arrhenious defined acid as compounds/elements which disoociates in water and donates/releases H+ ions
Q2) Option C -- As it will readily donate H+ ion
Q3) Option D -- A bronsted Lowrey acid is any compound which is capable of donating H+ ion meaning it must contain a "H". In our Reaction HCl , H3O+ and H2O all are capable of donaing proton/H+,: while CL- cannot
Q4) Option C -- The conjugate base of an acid is formed when the acid donates a proton. HSO4- donates a proton to become SO4-2 hence HSO4- is Conjugate acid and SO4-2 is the conjugate BASe.
Since its aqueous solution and medium is acidic; H3O+ exists. H3O+ is the conj acid and H2O is the Conjugate Base
Q5) Option A -- Resp. Conjugate bases are HNO3, HF, CH3COOH, HCN --
HNO3 is the strongest acid among the four. HF, HCN and CH3COOH are weaker acids due to strong H-F and H-C bond in HF and HCN respectively. and Covalent bond in case of CH3COOH
Q6) Option C -- The Strongesta cidic solution will be the one which ahs the max H+ ions available readily for donating. In the Option C we have H3O+ and HF ions both readily available to donate H+ ions and acts as acids.
In option where A- is present will not be acidic coz A- being stronger than H3O+ will take the H+ ions anf form HA.

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